Predistortion system and amplifier for addressing group...

Details Predistortion system and amplifier for addressing group... Predistortion system and amplifier for addressing group...

2005-12-13

2010-11-09

Pan, Yuwen (Department: 2618)

Telecommunications

Transmitter

Noise or interference elimination

C455S114100, C455S114200, C375S297000

Reexamination Certificate

active

07831221

ABSTRACT:
An amplifier includes an RF power amplifier and a predistortion circuit coupled to the power amplifier. The predistortion circuit affects an input path of an RF input signal to the power amplifier. The predistortion circuit is operable for detecting a level of an input signal and generating a delay in the input path based on the input signal level. This enables predistortion correction of a new distortion term AM/DM, in addition to the well known AM/AM and AM/PM terms. The new AM/DM term represents the distortion that is caused by the delay modulation of the input signal as a function of the envelope power variation within the input signal.

REFERENCES:
patent: 4335363 (1982-06-01), Bowers
patent: 5420541 (1995-05-01), Upton
patent: 5444418 (1995-08-01), Mitzlaff
patent: 5568086 (1996-10-01), Schuss
patent: 5739723 (1998-04-01), Sigmon
patent: 5757229 (1998-05-01), Mitzlaff
patent: 5786727 (1998-07-01), Sigmon
patent: 5880633 (1999-03-01), Leizerovich
patent: 5886575 (1999-03-01), Long
patent: 5966059 (1999-10-01), Sigmon
patent: 6085074 (2000-07-01), Cygan
patent: 6097252 (2000-08-01), Sigmon
patent: 6128479 (2000-10-01), Fitzpatrick
patent: 6133788 (2000-10-01), Dent
patent: 6181199 (2001-01-01), Camp, Jr.
patent: 6262629 (2001-07-01), Stengel
patent: 6320462 (2001-11-01), Alley
patent: 6320464 (2001-11-01), Suzuki
patent: 6356149 (2002-03-01), Stengel
patent: 6374092 (2002-04-01), Leizerovich
patent: 6388513 (2002-05-01), Wright
patent: 6396341 (2002-05-01), Pehlke
patent: 6469581 (2002-10-01), Kobayashi
patent: 6472934 (2002-10-01), Pehlke
patent: 6492867 (2002-12-01), Bar-David
patent: 6577199 (2003-06-01), Dent
patent: 6617929 (2003-09-01), Kim et al.
patent: 6700444 (2004-03-01), Pengelly
patent: 6731168 (2004-05-01), Hedberg et al.
patent: 6731172 (2004-05-01), Thompson
patent: 6731173 (2004-05-01), Thompson
patent: 6798295 (2004-09-01), Pengelly
patent: 6853244 (2005-02-01), Robinson
patent: 6853245 (2005-02-01), Kim
patent: 6864742 (2005-03-01), Kobayashi
patent: 6897721 (2005-05-01), Hellberg
patent: 7164316 (2007-01-01), Kim et al.
patent: 7170345 (2007-01-01), Hongo
patent: 7268617 (2007-09-01), Kijima
patent: 7336725 (2008-02-01), Cova
patent: 2002/0186079 (2002-12-01), Kobayashi
patent: 2003/0013284 (2003-01-01), Emrick
patent: 2003/0076166 (2003-04-01), Hellberg
patent: 2004/0119533 (2004-06-01), Kwon
patent: 2004/0174212 (2004-09-01), Kim
patent: 2004/0189378 (2004-09-01), Suzuki
patent: 2004/0196922 (2004-10-01), Leffel
patent: 2004/0246048 (2004-12-01), Leyonhjelm
patent: 2005/0017800 (2005-01-01), Robinson
patent: 2005/0017802 (2005-01-01), Robinson
patent: 2005/0134377 (2005-06-01), Dent
patent: 2005/0157814 (2005-07-01), Cova
patent: 2006/0097783 (2006-05-01), Okubo
patent: 1104093 (2001-05-01), None
patent: 1353439 (2003-10-01), None
patent: 1536556 (2005-06-01), None
patent: WO2004001958 (2003-12-01), None
patent: WO2004049558 (2004-06-01), None
patent: WO2005031967 (2005-04-01), None
Kelly Mekechuk, et al.; Test Instruments Coupled with EDA software maximize Doherty Amplifier Linearity and Efficiency; article; Sep. 27, 2004, EETIMES.
Yu Ahao, et al., Doherty Amplifier with DSP Control to Improve Performance in CMDA Operation; article; 2003EEE; La Jolla, CA, USA.

Affiliated with

Also associated with

Rating

Predistortion system and amplifier for addressing group... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Predistortion system and amplifier for addressing group..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Predistortion system and amplifier for addressing group... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4157231